SSE Airtricity has become the latest energy firm to slash gas and electricity prices with an 8% drop.
The company said it is reducing natural gas prices for around 127,000 Belfast customers.
It also has around 170,000 electricity customers right across Northern Ireland.
Electricity costs will fall by 8%, while natural gas prices will be reduced by 7.8% when the price cuts come into effect next month. That will mean an average saving of more than £50 a year for customers.
It said the move followed a review by the company of its costs associated with energy supply.
It's a welcome boost for homes and businesses who will reap the rewards of cheaper overall energy bills.
SSE Airtricity is the third electricity provider to drop its prices this month after Northern Ireland's largest supplier Power NI announced a fall of 9.2%.
And Londonderry-based Budget Energy said it was cutting costs by 5%.
SSE Airtricity's managing director Stephen Wheeler said the announcement "delivers on the promise we have always made that if we can lower energy prices, we will".
Richard Williams of the Consumer Council said households "will now start to feel the benefit" of falling oil and gas prices in their own pockets.